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powerpc/mm/hash64: Allocate larger PMD table if hugetlb config is enabled 

We use the second half of the page table to store slot information, so we must
allocate it always if hugetlb is possible.

Fixes: bf9a95f9a6 ("powerpc: Free up four 64K PTE bits in 64K backed HPTE pages")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V 2018-02-11 20:30:07 +05:30 committed by Michael Ellerman
parent fae2211697
commit 4a7aa4fecb
2 changed files with 3 additions and 2 deletions
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2
arch/powerpc/include/asm/book3s/64/hash-64k.h
View File

@ -140,7 +140,7 @@ static inline int hash__remap_4k_pfn(struct vm_area_struct *vma, unsigned long a
}
#define H_PTE_TABLE_SIZE PTE_FRAG_SIZE
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined (CONFIG_HUGETLB_PAGE)
#define H_PMD_TABLE_SIZE ((sizeof(pmd_t) << PMD_INDEX_SIZE) + \
(sizeof(unsigned long) << PMD_INDEX_SIZE))
#else

3
arch/powerpc/include/asm/book3s/64/hash.h
View File

@ -23,7 +23,8 @@
H_PUD_INDEX_SIZE + H_PGD_INDEX_SIZE + PAGE_SHIFT)
#define H_PGTABLE_RANGE (ASM_CONST(1) << H_PGTABLE_EADDR_SIZE)
#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && defined(CONFIG_PPC_64K_PAGES)
#if (defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLB_PAGE)) && \
defined(CONFIG_PPC_64K_PAGES)
/*
* only with hash 64k we need to use the second half of pmd page table
* to store pointer to deposited pgtable_t